body{
    margin:0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.background{
    position: absolute;
    left: 0;
    top: 0;
}


@media only screen and (max-width:800px){
    .background{    
        display:none;

    }
    
    .backgroundMobile{
        position: fixed;
        height: 100%;
        width: 100%;
    }
}